Heather Downs Mh S/D, NC
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2028). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Heather Downs Mh S/D at a glance
Heather Downs Mh S/D serves about 112 people through 44 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Johnston County, North Carolina. EPA system ID: NC0351173; phone on file: 919-653-6999. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Heather Downs Mh S/D is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 0 (not detected) |
| 2025 | 0 (not detected) |
How Heather Downs Mh S/D compares
Of the 1,925 North Carolina systems with a lead result, the median latest reading is 0 ppb; 5 are over 15 ppb right now and 75 have gone over at some point. Heather Downs Mh S/D's reported as 0 (not detected) sits at the 25th percentile in North Carolina and the 10th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
46 other systems share Johnston County; 7 of them have a higher latest lead result than Heather Downs Mh S/D. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Johnston Co-West | 99,027 | 0 (not detected) |
| Clayton, Town Of | 30,876 | 0 (not detected) |
| Johnston Co-East | 25,212 | 0 (not detected) |
| Smithfield, Town Of | 12,900 | 0 (not detected) |
| Flowers Plantation | 12,809 | 0 (not detected) |
| Selma, Town Of | 6,190 | 0 (not detected) |
| Benson, Town Of | 4,802 | 0 (not detected) |
| Town Of Clayton - North | 4,703 | 0 (not detected) |
| Pine Level, Town Of | 2,413 | 1.4 ppb |
| Four Oaks, Town Of | 2,302 | 3 ppb |
Next steps for Cary, NC
Look up your address in Heather Downs Mh S/D's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Heather Downs Mh S/D whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Small systems behave differently: why small systems go over more often.